what is the format of the ld-list-snp parameter?

I am calculating the LD for some snps and in order to get the pair-wise ld for a specific snp list, I use ld-snp-list mysnp.txt, but it shows could not open the txt file? so can anybody help?

This is the snp list: exm1196037 rs214250 rs214249 rs214246 rs7200589 rs1204042 exm1196059 exm1196065 rs11649255 rs11644916 rs3842949 rs3848361 rs17136060 rs7359414 rs3916990 rs11646942 rs9925273 rs7195617 rs12921862 rs11644916